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Dear All, I have seen several installation Power Plant in Indonesia with Total Capacity of 100 MW, they make it 2 x 50 MW. What is the reason of 2 x 50 MW installed, instead of 1 x 100 MW? Thank you.

HTURKAK, It means to design superstructure, we have to wait until soil type is known? Is that what you are trying to say?

GeorgeTheCivilEngineer, Yes, agreed. Superstructure loading data will make the foundations design more efficient. But the point of my question is that, why Soil Investigation is needed to design the superstructure? My understanding is that the design of superstructure has nothing to do with...

Dear All, I am having confusion when my Senior Engineer in Company said that "Soil Investigation will impact Steel Structure for Boiler". In my understanding, Steel Structure of Boiler will only be impacted by the load from the Boiler, wind, seismic, etc. And Soil Investigation will be used to...

RRaghunath, Appreciate your straightforward answer. bacon4life, Hope that others will share their experience for your question.

Hi All, In commissioning a Power Plant, if bypass capacity is 40% and we want to do 100% Load Rejection Test, is it recommended to go ahead with Load Rejection Test? As if I am assuming, the excess load (60%) will go to safety valves? Is my understanding correct? Kindly share your experience...

MintJulep, I ask for suggestion, please do not ask me back [dazed] TheTick, Yes, you are right. I am so confused right now, Sir. EnergyProfessional, Actually, I have talked to the Dean of the university and after I shared the same story above (regarding my current job and my purpose to...

Dear All, I would like to have suggestion to choose between Master in Mechatronics or Engineering Management based on your opinion. I have a Mechanical Engineering background. I have been a Project Engineer around 3 years. Currently I am working in EPC Company with core business producing...

Thank you so much IFRs!

IFRs, Based on what you said, "unless they are part of an assembly that requires stress relief". This means only for shell plate where nozzle attached (or etc.) requires thermal stress relief, right? For example a tank consists of 20 plates with 30 mm thick for 1st course, 1 of the shell...

Thanks for the help weldstan!

weldstan, Alright, I understand why you said "Not if the PQR is impact tested." If the PQR of A 573 Gr. 70 plate is already impact tested, then it is certain that WPS of A 573 Gr. 70 can be used for A 36 plate. But If the PQR of A 573 Gr. 70 is not impact tested and I want to use for A 36...

weldstan, What do you mean by "Not if the PQR is impact tested."? So, In my case stated above, the WPS for A 573 Gr. 70 plate can be used for A 36 plate, right?

Thanks JStephen, So, tank with shell thick more than 25 mm is not required to be stress-relieved. The thermal stress relief is required for nozzles, flush-type cleanout fittings and flush-type shell connections. IFRs, And that is for nozzles, flush-type cleanout fittings and flush-type shell...

weldstan, Alright, there are material specifications which include impact temperature requirement. 212197, Thanks for the guidance! So, if I have a WPS for A 573 Gr. 70 plate which is P-No.1 Gr. No.2, I can use it for A 36 plate (in which it is classified as P-No.1 Gr. No.1) or vice versa...

Dear All, Based on API STD 650 Section 5.7.4.1, thermal stress relief only applies to flush-type cleanout fittings and flush-type shell connections which are attached to 25 mm thick shell, right? If the shell thickness is 24 mm, we do not need to do thermal stress relief to flush-type cleanout...

weldstan, What do you mean by Construction Code? So, you are saying that the impact property of a material depends on the MDMT? My understanding about impact property requirements is just like tensile requirements. For example in ASTM A 36, it is clearly stated about tensile requirements of...

Dear All, I have read in this forum that if We have a WPS with same P-NO. material but different Gr. No., We can use the same WPS for that different Gr. No. material when the different Gr. No. material does not have impact property requirements. My question is how to know whether a material...

IFRs, After all the discussion we have had, I think I will suggest to use the required annular bottom thickness of 1/4" and then add 1/16" thick of corrosion allowance under 1/4" thick of shell. Thanks IFRs!!!

IFRs, Yea, I was thinking to submit a technical inquiry to API, but I am still not sure about my inquiry itself . Let me ask you this, if you're the owner of a company which want to build a tank and working with a consultant who recommends to use annular bottom plate thickness 5/16" under 1/4"...